Q:1. Magnetic Field intensity is given as H =[(x
2yz )/(y+1)] ax + [3x2z2] ay - [xyz2/ (y+1)] az

Find.
(a) the vector current density

(b) Evaluate the both sides of Stokes Theorm such that the total current is in the x-

direction that crosses the strip x=2, 2≤ y ≤ 4 , 3 ≤ z ≤ 4

Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 mpa and -10°c at a rate of 0.05 ka/s and leaves at 0.8 mpa and 50°c. the refrigerant is cooied in the condenser to 0.72 mpa and 26'c. it is then throttled to 0.15 mpa. sketch the t-s diagram for the system and evaluate: 6) the rate of heat removai from the refrigerated space (kw), it) the power input to the compressor (kw), ii) the isentropic efficiency of the compressor (%), and iv) the cop of the refrigerator.